Method of construction of talking-machines.



P. B. DELANY.

METHOD OF CONSTRUCTION OF TALKING MACHINES.

APPLICATION FILED OCT. 21. I914.

Patented July 18, 1916.

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Originalepplication filedJuly 19, 1913, Serial No. 779,947.

PATRICK B. DELANY, OF SOUTH ORANGE, NEVJ JERSEY.

METI-I OD 015 CONSTRUCTION OF TALKING-MACHINES.

Specification of Letters Patent.

PatentediJuly 18, 1916.

Divided and this application filed October 21,

1914. Serial No. 867,709.

To all whom it may concern:

Be it known that I, PATRICK B. DELANY, a citizen. of the United States,residing at South Orange, county of Essex, State of New Jersey, haveinvented a certain new and useful Method of Construction of Talking-Machines, of. which the following is a specification.

This invention relates to improved methods of phonograph constructionandforms a divisionalapplication from my co-pending application SerialNo. 779,947 filed July 19, 1913, and also in pa t a continuation of myprior application No. 739,939, filed J an. 3, 1913.

The invention is designed to eliminate scratching orv scraping noisefrom the record and to improve the quality of recordations andreproductions. It is well known that even the smoothest surfacerevolving under the needle will produce quite a loud or observable noiseemitted by the horn or amplifier. It has been found that this is largelydue-to the method of construction in which a metallic vibrating armconnects the record andthe diaphragm of the sound box. Other methodsemploying vibrating arms of wood,

bone or other hard substance also produce the same effect to a modifieddegree. It has been sought to remedy such defect by rubber or othervibration deadening material interposed at' the point of contact betweenthe vibrating arm andv the diaphragm; but on account of the elasticityof such materials, or for other reasons, the tone of reproduction hasbeen greatly lowered and modified and, owing to the instability of suchmaterials, particularly under pressure, the instruments soon become outof order.

I have devised a method of mounting the arm whereby metallic connectionbetween therecord and diaphragm is entirely severed without appreciableloss of force but with marked suppression of the objectionable scrapingsound, the result being apure and faithful reproduction.

The object of this invention is attained by a method of mounting the armin cells,

one cell being interposed between the arm and its support and anothercell interposed between the arm and the diaphragm, the cells being thenfilled with a mass of material of suitable density and stability tocarry the major or sound producing Vibrations, and yet of such characteras to suppress or eliminate objectionable extraneous, incidental andminor vibrations that produce the extraneous or scraping sounds in thetones produced by the diaphragm. The material of such mass may be asingle material or a compound material composed, for instance, ofrubber, asphaltum, tar, waxes of various kinds, etc, or compounds of anytwo or more of such simple materials.

The invention further comprises features hereinafter set forth.

The drawing is an elevation partly in section of a device constructed inaccordance with my improved method.

1 indicates the sound box, 2 the diaphragm, 3 the vibrating arm, l theneedle holder, and and-4 the needle.

On each side of the diaphragm is a circu lar gasket 12. These gasketsand-the pcriphery of the diaphragm are securely hold in the sound box bya meltable mass 16, which also firmly cements the gaskets to thediaphragm. In mounting the diaphragm, it is arranged with one or moreretaining gaskets in the sound box and the gaskets and diaphragm arefastened to the sound box by the lneltablc mass while the latter is in aheated plastic condition. When the mass cools it hardens and thediaphragm and gaskets are securely held in place but the diaphragm isinsulated from the sound box.

The arm has a lateral bar or rod 5 with a cross-head thereon adapted tobe seated in, embedded or surrounded by a mass 8 of material, suchgenerally as hereinbef'ore described, that absorbs, eliminates orsuppresses secondary or minor objectionable vibrations, and is containedin a cell or container 7- attached to or integral with an extension fromthe sound box. Such a method of mounting the vibrating arm is disclosedin my application Serial No. 700,394, filed May 29, 1912. The upperportion of the vibrating arm is divided transversely. The end portion 9is attached to the diaphragm in any ordinary or suitable way and theadjacent ends of the arm are mechanically united by means of a mass orcompound 11 that fills a cell or container 10 carried by the end portion9 of the arm and in which the adjacent portion of the vibrating arm isembedded. Interruption of the continuity of the arm by a body ofmaterial acting to suppress or eliminate minor undesirable vibrationstherein affords marked improvement in character or quality and purity oftone.

The material, mass or compound used in the practice of this invention isby preference one that becomes soft and even viscous or semi-liquidunder the influence of a suitable degree of heat and which at ordinarytemperaturesroom temperaturebecomes and remains hard, meaning by thatsuflieiently rigid or stable to follow the primary vibrations of thearm. This arrangement permits of firm attachment of the inner section ofthe arm to the diaphragm, and, what is of great importance, while saidmass is yet in a plastic state in the process of cooling or setting, thepart attached to the diaphragm and the part attached to the sup port areallowed to assume positions in the connecting masses controlled by thenormal position of the diaphragm in its mounting and of the support inits anchorage so that there is no warped or biased strain, a conditionpractically unavoidable in prior methods of construction and mounting.If, when the different parts are connected, or upon completion of thedifl erent mountings, the sound box as a. whole be placed for a shorttime in a temperature suflicient to soften the mass in which thediaphragm and the gaskets are held and which fills the recessed portionof the case or cell, and also the mass in the container in which the armsupport is anchored, and the mass in the container comprising thecoupling of the parts of the arm, all the parts will yield to a positionof unbiased coordination and establish a true and highly sensitivevibrating system. This equalization of strain between the various partspermitting them to assume normal unrestrained positions under action ofheat forms an important feature of my method of construction.

It is obvious that under ordinary mechani cal skill changes could bemade without departing from the spirit and scope of the invention. Itherefore do not limit myself to the particular structure shown, whichdiscloses only one of the many structures with which my invention may becarried out. In

my copending application for Patent No. 867,710 filed simultaneouslyherewith I have shown and claimed certain features of the inventionwhich are herein shown but not claimed.

In my copending application No. 779,947 filed July 19, 1913 and No.867,710 filed Oct. 21, 1911, I have claimed certain subject matter shownin this application but not claimed herein.

No claim is made herein to the apparatus herein shown and described assuch subject matter is claimed in my copending application for PatentNo. 867,710, filed Oct. 21, 191 1.

I claim 1. The method herein described of connecting parts of thereproducing mechanism of a talking machine, which consists in applyingto the juncture of the diaphragm and soun box and to the juncture ofmetallically unconnected sections of the stylus arm ad'acent thediaphragm, masses of a suita 1e meltable material inert to vibrationsand subjecting the assembled parts to heat, whereby the parts assumenormal positions relatively to one another and are so permanently heldupon the cooling of the connecting masses.

The method herein described of connectin parts of the reproducingmechanism of a talking machine which consists in applying to thejuncture of the diaphragm and sound box, of the stylus arm support andthe sound box and of the metallically unconnected sections of the stylusarm adjacent the diaphragm, masses of a suitable meltable material inertto vibrations and subjecting the assembled parts to heat, whereby theparts assume normal positions relatively to one another and are sopermanently held upon the cooling of the connecting masses.

The method herein described of connecting parts of the reproducingmechanism of a talking machine which consists in applying to thejuncture of the metallically unconnected sections of the stylus armadjacent the diaphragm and of the arm support and sound box masses of ameltable plastic material inert to vibrations and subjecting theassembled parts to heat for the adjustment of the parts in operativepositions.

41. The method herein described of connecting parts of the reproducingmechanism of a talking machine, which consists in applying to thejuncture of the diaphragm and the sound-box and to the juncture of thestylus arm and its holder masses of a suitable meltable material inertto vibrations, allowing said masses to harden and then heating thematerial. to a suiiicient degree to allow the diaphragm and stylus armto relax and find neutral or equalized positions.

5. The method herein described of mounting a vibratory diaphragm Whichconsists 5 in arranging the diaphragm With a retaining gasket in asupporting frame and in fastening the diaphragm to the gasket and to theframe by a meltable mass While in a heated plastic condition but Whichhardens on cooling. 10

In testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY. lVitnesses:

ANNIE M. DELANY, LAURISTON BUNKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

It is hereby certified that in Letters Patent No. 1,191,674, grantedJuly 18, 1916, upon the application of Patrick 13. Delany, of SouthOrange, New Jersey, for an im rovement in Methods of Construction of'lalkine-Machines errors a car in the printed specification requiringcorrection as follows; Page 2, strike out the paragraph contained inlines 6943; same page, line 116, claim 3, after the Word operativeinsert the Word normal; and that the said Letters Patent should be readwith these corrections therein that the same may conform to the recordof th case in the Patent Office.

Signed and sealed this 28th day of November, A. D., 1916.

[SEAL] F. W. H. CLAY,

Acting (Jammz'ssioner of Patents. Cl. 274-35.

Corrections in Letters Patent No. 1,191,67

Corrections in Letters Patent No. 1,191,674.

It is hereby certified that in Letters Patent No. 1,191,674, grantedJuly 18, 1916, upon the application of Patrick B. Delany, of SouthOrange, New Jersey, for an improvement in Methods of Construction ofTalking-Machines,errors appear in the printed specification requiringcorrection as follows: Pagev 2, strike out the paragraph contained vinlines 69-73; same page, line 116, claim 3, after the word operativeinsert the Word normal; and that Signed and sealed this 28th day ofNovember, A. D., 1916.

" i F. W. H. CLAY,

Acting Commissioner of Patents.

[SEAL]

